
.banner {
    height: 100px; width: 100%; 
    background: url(../../img/a.jpg) no-repeat; 
    background-size:cover;
}

.time-line {
    margin-top: 25px;
    margin-bottom: 40px;
}

.time-line .h1 {
    color: gray;
}

.article-content {
    width: 800px;
    height: 800px;
    margin: 30px auto;
}